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Ulleksa [173]
3 years ago
10

Carbon dioxide can change directly from the solid phase to the gaseous phase. true or false

Chemistry
1 answer:
uysha [10]3 years ago
3 0
True, its called sublimation. (vice versa as well)
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Look at the equation CO2 + H2 = CO + H20.
sergejj [24]

Answer:

CO is considered as a product.

Explanation:

A general chemical equation for a combination reaction follows:

To write a chemical equation, we must follow some of the rules:

The reactants must be written on the left side of the direction arrow.

A '+' sign is written between the reactants, when more than one reactants are present.

An arrow is added after all the reactants are written in the direction where reaction is taking place. Here, the reaction is taking place in forward direction.

The products must be written on the right side of the direction arrow.

A '+' sign is written between the products, when more than one products are present.

For the given chemical equation:

are the reactants in the reaction and  are the products in the reaction.

Hence, CO is considered as a product.

3 0
3 years ago
Which sentence describes all atoms of one element?
allsm [11]

Answer:

4. they have the same number of protons

Explanation:

while all the other particles and attributes can be changed, protons cannot.

4 0
3 years ago
Once an enzymatic reaction is completed, the enzyme releases what?
sleet_krkn [62]

Answer:

Once an enzymatic reaction is completed, the enzyme releases substrates.

Explanation:

The enzyme will always return to its original state at the completion of the reaction. One of the important properties of enzymes is that they remain ultimately unchanged by the reactions they catalyze. After an enzyme is done catalyzing a reaction, it releases its products (substrates).

5 0
2 years ago
The transfer of thermal energy by electromagnetic waves​
katen-ka-za [31]

Answer:

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4 0
3 years ago
A scientist wants to react a barium chloride salt with an acid. to speed up the reaction, the scientist crushes the barium chlor
In-s [12.5K]

Out of the following given choices;

A. increasing the pH of the salt.

B. increasing the surface area of the salt.

C. increasing the pressure of the salt.

<span>D. increasing the temperature of the salt.</span>

 

The answer is B. When a substance is reduced to smaller sizes, its surface area to volume ratio increases. Therefore crushing barium salts to smaller particles increase the surface area on which it reacts with the acid. This consequently increases the rate of speed of the reaction.






6 0
3 years ago
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